优化

XHWK.WKTool/XHMicroLessonSystemWindow.xaml

                 <Image x:Name="imgPlayerRight" Width="172" Height="124" Source="./Images/microLessonSystem_17.png"  HorizontalAlignment="Right"  Margin="10,7,10,10" VerticalAlignment="Top" Visibility="Collapsed"/>
                 <Image x:Name="imgPlayerLeftUnder" Width="172" Height="124" Source="./Images/microLessonSystem_17.png"  HorizontalAlignment="Left"  Margin="10,7,10,10" VerticalAlignment="Bottom" Visibility="Collapsed"/>
                 <Image x:Name="imgPlayerRightUnder" Width="172" Height="124" Source="./Images/microLessonSystem_17.png"  HorizontalAlignment="Right" Margin="10,7,10,10" VerticalAlignment="Bottom" Visibility="Collapsed"/>
-                <StackPanel Grid.Row="0" Orientation="Horizontal" Background="#FFFFFF" Width="180" HorizontalAlignment="Right"
+                <StackPanel Grid.Row="0" Orientation="Horizontal" Background="#FFFFFF" Width="180" HorizontalAlignment="Center"
             Height="58" Margin="0,830,20,0" Grid.Column="1">
                     <Button Cursor="Hand" Style="{StaticResource {x:Static ToolBar.ButtonStyleKey}}"
                     x:Name="last_button"
                         <Button.Content>
                             <StackPanel>
                                 <Image Width="16" Source=".\Images\class_p1.png" />
-                                <TextBlock Margin="0,8,0,0" Text="上一页" />
                             </StackPanel>
                         </Button.Content>
                     </Button>
                                 <TextBlock Text="/" TextAlignment="Center" FontSize="15"/>
                                 <TextBlock Text="{Binding pagenum}" TextAlignment="Center" FontSize="15"/>
                             </StackPanel>
-
-                            <TextBlock
-                            Margin="0,8,0,0"
-                            HorizontalAlignment="Center"
-                            Text="页码" />
                         </StackPanel>
                     </Grid>
                     <Button Cursor="Hand" Style="{StaticResource {x:Static ToolBar.ButtonStyleKey}}"
                         <Button.Content>
                             <StackPanel>
                                 <Image Width="16" Source=".\Images\class_p2.png" />
-                                <TextBlock Margin="0,8,0,0" Text="下一页" />
                             </StackPanel>
                         </Button.Content>
                     </Button>

XHWK.WKTool/XHMicroLessonSystemWindow.xaml.cs

         /// <param name="e"></param>
         private void BtnScreenshot_Click(object sender, RoutedEventArgs e)
         {
-            if (APP.IsLoginType == false)
-            {
-                Login();
-                return;
-            }
             string time = GetTimeStamp();
             string desktopPath = Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory) + time + ".jpg";
             ImageHelper.GetScreenshot(new System.Drawing.Rectangle(0, 0, 0, 0), desktopPath);
         /// <param name="e"></param>
         private void BtnRecord_Click(object sender, RoutedEventArgs e)
         {
-            if (APP.IsLoginType == false)
-            {
-                Login();
-                return;
-            }
 
             blackboard_canvas.Visibility = Visibility.Visible;
             StartRecord();
         /// <param name="e"></param>
         private void BtnStop_Click(object sender, RoutedEventArgs e)
         {
-            if (APP.IsLoginType == false)
-            {
-                Login();
-                return;
-            }
             blackboard_canvas.Visibility = Visibility.Collapsed;
             EndRecord();
         }
         /// <param name="e"></param>
         private void BtnPrint_Click(object sender, RoutedEventArgs e)
         {
-            if (APP.IsLoginType == false)
-            {
-                Login();
-                return;
-            }
             try
             {
                 iTextSharp.text.Document document = new iTextSharp.text.Document(iTextSharp.text.PageSize.A4, 25, 25, 25, 25);